<template>
  <div class="article-container">
    <!-- <h1 class="article-title">{{article.title}}</h1> -->
    <!-- 方式1 通过query传递 -->
    <!-- <div>id={{$route.query.id}}</div> -->
    <!-- 方式2 通过params传参 -->
    <!-- <div>id={{$route.params.id}}</div> -->
    <!-- 数据使用 -->
    <!-- <div>id={{articleId}}</div> -->
    <!-- 导航栏 -->
    <van-nav-bar class="page-nav-bar"  title="黑马头条">
      <van-icon slot="left" name="arrow-left" @click="$router.back()"></van-icon>
    </van-nav-bar>
    <!-- /导航栏 -->
    <div class="main-wrap">
      <!-- 加载中 -->
      <!-- 通过状态值控制页面的显示 -->
      <div class="loading-wrap" v-if="loading">
        <van-loading color="#3296fa" vertical>加载中</van-loading>
      </div>
      <!-- /加载中 -->
      <template v-else>
        <div class="article-detail" v-if="article.title">
          <h1 class="article-title">{{ article.title }}</h1>
          <van-cell class="user-info" center :border="false">
            <van-image
              class="avatar"
              slot="icon"
              round
              fit="cover"
              :src="article.aut_photo"
            />
            <div slot="title" class="user-name">{{ article.aut_name }}</div>
            <div slot="label" class="publish-date">{{ article.pubdate }}</div>
            <!-- <van-button
              v-if="!article.is_followed"
              :loading="followLoading"
              class="follow-btn"
              type="info"
              color="#3296fa"
              round
              size="small"
              icon="plus"
              @click="onFollow"
              >关注</van-button
            >
            <van-button  :loading="followLoading" class="follow-btn" round size="small" v-else @click="onFollow"
              >已关注</van-button
            > -->
            <!-- <FollowUser
              :isFollowed="article.is_followed"
              @set-isFollowed="article.is_followed = $event"
              :userId="article.aut_id"
            ></FollowUser> -->
            <!-- 用v-model把事件进行优化 -->
            <FollowUser
              v-model="article.is_followed"
              :userId="article.aut_id"
            ></FollowUser>
          </van-cell>
          <div
            class="article-content markdown-body"
            v-html="article.content"
            ref="articleRef"
          ></div>
          <van-divider>正文结束</van-divider>
          <!-- 父组件，监听列表的事件 -->
        <comment-list :source="article.art_id"
        @set-totalCount ="totalCount=$event"
        ref="commentRef"
        :list="commentList"
        @reply-click="onReplyClick"></comment-list>
        </div>
        <template v-else>
          <!-- 加载完成-文章详情 -->
          <div class="article-detail" v-if="article.title"></div>
          <template v-else>
            <div class="error-wrap" v-if="errStatus === 404">
              <van-icon name="failure" />
              <p class="text">该资源不存在或已删除！</p>
            </div>
            <!-- 加载失败：404 -->
            <!-- 加载失败：其它未知错误（例如网络原因或服务端异常） -->
            <div class="error-wrap" v-else>
              <van-icon name="failure" />
              <p class="text">内容加载失败！</p>
              <van-button class="retry-btn">点击重试</van-button>
            </div>
          </template>

          <!-- /加载失败：404 -->
        </template>
      </template>
    </div>
    <!-- 底部区域 -->
    <div class="article-bottom">
      <van-button class="comment-btn" type="default" round size="small"
      @click="isPostShow = true"
        >写评论</van-button
      >
      <van-icon name="comment-o" :info="totalCount" color="#777" />
      <!-- <van-icon color="#777" name="star-o" /> -->
      <CollectActive v-model="article.is_collected"
      :articleId="article.art_id"></CollectActive>
      <LikeArticle v-model="article.attitude"
      :articleId="article.art_id"></LikeArticle>
      <van-icon name="share" color="#777777"></van-icon>
    </div>
    <van-popup v-model="isPostShow" position="bottom">
      <!-- 新增弹层 -->
      <CommentPost :target="article.art_id"
      @onPostSuccess="onPostSuccess"></CommentPost>
    </van-popup>
    <!-- 回复弹层 -->
      <van-popup v-model="isReplyShow" position="bottom"
      :style="{height:'100%'}"
      >
      <CommentReplay :comment="currentComment"
      @close="isReplyShow=false" v-if="isReplyShow"></CommentReplay>
      </van-popup>
  </div>
</template>

<script>
// import { ImagePreview } from 'vant'
import 'github-markdown-css/github-markdown.css'
import 'github-markdown-css/github-markdown-light.css'
import { getArticleById } from '../../api/article.js'
import { ImagePreview } from 'vant'
import FollowUser from '@/components/follow-user/index.vue'
import CollectActive from '@/components/collect-article/index.vue'
import LikeArticle from '@/components/like-article/index.vue'
import CommentList from '@/views/article/comment-list.vue/index.vue'
import CommentPost from '@/views/article/comment-list.vue/comment/comment-post.vue'
import CommentReplay from '@/views/article/comment-list.vue/comment/comment-reply.vue'
// import { addFollow, deleteFollow } from '@/api/user.js'
// ImagePreview(
//   [
//     'https://img01.yzcdn.cn/vant/apple-1.jpg',
//     'https://img01.yzcdn.cn/vant/apple-2.jpg'
//   ]
// )
export default {
  name: 'ArticlePage',
  components: {
    FollowUser,
    CollectActive,
    LikeArticle,
    CommentList,
    CommentPost,
    CommentReplay
  },
  //   动态参数的接收
  props: {
    articleId: {
      type: [String, Number, Object],
      required: true
    }
  },
  provide () {
    return {
      articleId: this.articleId
    }
  },
  data () {
    return {
      article: {},
      //   定义数据
      loading: true,
      errStatus: 0,
      // followLoading: false
      totalCount: 0,
      isPostShow: false,
      commentList: [], // 发表评论
      currentComment: {},
      isReplyShow: false // 评论回复弹层
    }
  },
  watch: {
  },
  async created () {
    // const res = await getArticleById(this.articleId)
    try {
      const res = await getArticleById(this.articleId)
      //   if (Math.random() > 0.5) {
      //     throw new function (status) {
      //       this.response = { status }
      //     }(500)
      //   }
      console.log(res)
      this.article = res.data.data
      setTimeout(() => {
        const imgs = this.$refs.articleRef.querySelectorAll('img')
        const images = []
        imgs.forEach((img, index) => {
          images.push(img.src)
          img.onclick = function () {
            ImagePreview({
              images: images,
              startPosition: index
            })
          }
        })
      })
    } catch (error) {
      if (error.response && error.response.status === 404) {
        this.errStatus = 404
      } else {
        this.errStatus = 500
      }
    }
    this.loading = false
  },
  methods: {
    // async onFollow () {
    //   this.followLoading = true
    //   if (this.article.is_followed) {
    //     await deleteFollow(this.article.aut_id)
    //   } else {
    //     await addFollow(this.article.aut_id)
    //   }
    //   this.followLoading = false
    //   this.article.is_followed = !this.article.is_followed
    //   this.$toast.success('操作成功')
    // }
    // async  onClick () {
    //   if (this.value) {
    //     await deleteCollect(this.articleId)
    //   } else {
    //     await addCollect(this.articleId)
    //   }
    //   this.$emit('input',!this.value)
    //   this.$toast.success('操作成功')
    // }
    // onPostSuccess () {
    //   this.isPostShow = false
    //   this.totalCount++
    // }
    onReplyClick (comment) {
      this.currentComment = comment
      this.isReplyShow = true
    },
    onPostSuccess (comment) {
      this.isPostShow = false
      this.totalCount++
      // this.$refs.commentRef.list.unshift(comment)
      this.commentList.unshift(comment)
    }
  }
}
</script>

<style scoped lang="less">
.article-container {
  .main-wrap {
    position: fixed;
    left: 0;
    right: 0;
    top: 92px;
    bottom: 88px;
    overflow-y: scroll;
    background-color: #fff;
  }
  .article-detail {
    .article-title {
      font-size: 40px;
      padding: 50px 32px;
      margin: 0;
      color: #3a3a3a;
    }

    .user-info {
      padding: 0 32px;
      .avatar {
        width: 70px;
        height: 70px;
        margin-right: 17px;
      }
      .van-cell__label {
        margin-top: 0;
      }
      .user-name {
        font-size: 24px;
        color: #3a3a3a;
      }
      .publish-date {
        font-size: 23px;
        color: #b7b7b7;
      }
      .follow-btn {
        width: 170px;
        height: 58px;
      }
    }

    .article-content {
      padding: 55px 32px;
      /deep/ p {
        text-align: justify;
      }
    }
  }

  .loading-wrap {
    padding: 200px 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #fff;
  }

  .error-wrap {
    padding: 200px 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: #fff;
    .van-icon {
      font-size: 122px;
      color: #b4b4b4;
    }
    .text {
      font-size: 30px;
      color: #666666;
      margin: 33px 0 46px;
    }
    .retry-btn {
      width: 280px;
      height: 70px;
      line-height: 70px;
      border: 1px solid #c3c3c3;
      font-size: 30px;
      color: #666666;
    }
  }

  .article-bottom {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    justify-content: space-around;
    align-items: center;
    box-sizing: border-box;
    height: 88px;
    border-top: 1px solid #d8d8d8;
    background-color: #fff;
    .comment-btn {
      width: 282px;
      height: 46px;
      border: 2px solid #eeeeee;
      font-size: 30px;
      line-height: 46px;
      color: #a7a7a7;
    }
    .van-icon {
      font-size: 40px;
      .van-info {
        font-size: 16px;
        background-color: #e22829;
      }
    }
  }
}
</style>
